---I was trying to carry out the plan, but I failed.
---Well, you _____, for we were uncertain it would do ____.
| A．needn’t do that, in fact | B．needn’t have done, in effect |
| C．needn’t have, in practice | D．needn’t, in time |
The problem _______ you argued about yesterday has been solved.
| A．that | B．what | C．why | D．for which |
My aunt bought me a book, the name _______ I have forgotten.
| A．of it | B．which | C．whose | D．of which |
On the way home I met my friend John, from _______ home the thief had stolen a computer.
| A．whom | B．which | C．that | D．whose |
I hate the way _______ you talk to your mother.
| A．by which | B．on which | C．in which | D．which |
At last we found the hole in the wall _______ the mouse got into the house last night.
| A．in which | B．which | C．through which | D．by which |